EP3129998B1 - Circuit de commande permettant d'actionner un dispositif de verrouillage pour des appareils électroménagers et dispositif comprenant ledit circuit - Google Patents

Circuit de commande permettant d'actionner un dispositif de verrouillage pour des appareils électroménagers et dispositif comprenant ledit circuit Download PDF

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Publication number
EP3129998B1
EP3129998B1 EP15720272.2A EP15720272A EP3129998B1 EP 3129998 B1 EP3129998 B1 EP 3129998B1 EP 15720272 A EP15720272 A EP 15720272A EP 3129998 B1 EP3129998 B1 EP 3129998B1
Authority
EP
European Patent Office
Prior art keywords
door
locking
contact
actuator
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15720272.2A
Other languages
German (de)
English (en)
Other versions
EP3129998A1 (fr
Inventor
Stefano ROCCHITELLI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elettrotecnica Rold SRL
Original Assignee
Elettrotecnica Rold SRL
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Filing date
Publication date
Application filed by Elettrotecnica Rold SRL filed Critical Elettrotecnica Rold SRL
Priority to PL15720272T priority Critical patent/PL3129998T3/pl
Publication of EP3129998A1 publication Critical patent/EP3129998A1/fr
Application granted granted Critical
Publication of EP3129998B1 publication Critical patent/EP3129998B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4251—Details of the casing
    • A47L15/4257—Details of the loading door
    • A47L15/4259—Arrangements of locking or security/safety devices for doors, e.g. door latches, switch to stop operation when door is open
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B47/0002—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/064—Circuit arrangements for actuating electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0048—Circuits, feeding, monitoring
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0048—Circuits, feeding, monitoring
    • E05B2047/0067—Monitoring
    • E05B2047/0068—Door closed
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0072—Operation
    • E05B2047/0079—Bi-stable electromagnet(s), different pulse to lock or unlock

Definitions

  • the present invention relates to a door locking device for household appliances, in particular to a control circuit for operating said door locking device.
  • So-called locking devices for locking the door of a household appliance typically a washing machine, which comprise a device for detecting a closing condition of a household appliance door, a device for locking and possibly unlocking the household appliance door and a device for detecting the locking condition of such a door, are known and commonly used in the field of household appliances.
  • the device for detecting the closing condition determines whether the household appliance door is closed.
  • the closing condition of the door causes the closing of a switch, so that the electronics of the machine can detect that the door is actually in the closing position.
  • the closing condition of the door is a precondition for the door to be locked.
  • the locking device of the household appliance door can be actuated in order to lock the closed door if the door is in the closing condition, and thus take it to a condition in which the door cannot be opened.
  • the detecting device of the door closing condition thus provides a signal, which confirms that the door is closed. This signal transmits the fact that the door is closed and can thus be locked to a door locking control.
  • the detecting device of the door locking condition provides a signal, which confirms that the door is locked. This signal transmits the fact that the door can no longer be opened to the control electronics and that the household appliance can be actuated as a consequence.
  • prior patent EP1834027 describes a device based on a three-wire circuit as innovative.
  • the invention it describes relates to a door locking device which comprises the function of checking the closing of the door and of locking it as mentioned above, and is based on a circuit which comprises only three connecting contacts, according to the diagram shown in appended figure 1 , which reproduces figure 8 of patent EP1834027 .
  • FIG 3 diagrammatically shows an electric diagram for locking a door of known type with thermoelectric actuator, indicated as TA, in form of an actuator element indicated as PTC, and a device indicated as DV to detect a locking condition.
  • Such a solution includes the presence of a door contact switch 10, a locking contact switch 46 and an actuator 24, as electric switching diagram.
  • the door contact switch 10 and the actuator 24 are electrically connected in series between the connecting contact 20 and the second connecting contact 34.
  • the locking contact switch 46 is connected between the first connecting contact 20 and the third connecting contact 56.
  • the door contact switch 10 is open until the door of the household appliance is closed.
  • the door contact switch 10 is closed if the household appliance door is closed.
  • the first and the second connections 30 and 32 of the actuator are electrically connected to the first and the second connecting contacts 20 and 34.
  • the actuator 24 may by controlled by supplying energy by means of the first and the second connecting contacts 20 and 34, for example in form of pulse actuation.
  • the closed locking contact switch 46 produces an electric connection between the first 20 and the third 56 connecting contacts in response to the locking.
  • An electric connection between the first and the third connecting contacts 20 and 56 confirms that the door is locked and that the household appliance may be started to the control electronics of the household appliance.
  • the first connecting contact 20 is generally connected to ground.
  • the second connecting contact 34 is generally connected with an electric connection to a household appliance control in order to be able to supply the control signals (e.g. pulse signals) to the actuator 34.
  • control signals e.g. pulse signals
  • the first connecting contact 56 is preferably connected to a connection of a household appliance which has a predetermined potential, different from ground.
  • the current passes between the first and the second connecting contacts 20 and 56 if the locking contact switch 46 is closed. This passage of current confirms the locking condition of the household appliance.
  • a configuration of a control circuit for a door locking device of the type adapted to detect the closing condition and the locking condition of a household appliance door which is characterized in that it has at least one diode on the circuit branch which takes current from the circuit actuator, typically a solenoid.
  • the device according to the present invention comprises three connecting contacts to the household appliance, in particular a first contact 1, a second contact 2 and a third contact 3.
  • the device comprises a locking switch DL of the door, arranged electrically in series on said connecting contact 1.
  • the branch connected to the second contact 2 is electrically in series with the first branch connected to said first contact 1.
  • a third branch connected to said third contact 3 is electrically in parallel with said first branch connected to the first connecting contact 1, and an actuator 4 and a door locking switch DS are arranged in series on said third branch.
  • said actuator 4 may preferably consist of a solenoid valve, and in such a case the device will be supplied with alternating current.
  • the locking device described above operates as follows.
  • the circuit of the device is in the configuration of figure 4 , in which both switches, i.e. the door closing switch DS and the door locking switch DL, are open.
  • control electronics of the household appliance detects the door opening condition deriving from the opening of the closing switch DS.
  • the closing switch DS When the user manually closes the household appliance door, the closing switch DS is closed and the control electronics thus detects the closing of the circuit between the second 2 and third 3 connecting contact.
  • At least one control switch SW and at least one diode D are interposed between said third connecting contact 3 of the circuit of the household appliance and said actuator 4.
  • a first diode D1 and a second diode D2 are arranged electrically in parallel between said third contact 3 and said actuator 4 together with a control switch SW, which allows to connect said actuator 4 to said third connecting contact 3 in series selectively by means of either said first diode D1 or said second diode D2.
  • the closing switch DS on the third branch is open, and the locking switch DL on the first branch is also open, the control switch SW is in contact with the first diode D1, as shown in figure 4 .
  • the actuator 4 may be supplied with current because the circuit is closed between the second connecting contact 2 and the third connecting contact 3.
  • control electronics of the household appliance sends an electrical locking pulse in input to the third connecting contact 3.
  • said first diode D1 allows the passage of an electrical pulse consisting of a positive half wave. Only such pulse can thus activate said actuator 4, because it can cross said first diode D1.
  • the actuator 4 can close the locking switch DL and switch the control switch SW on said second diode D2.
  • both switches DS and DL are thus closed, the control unit detects a door closing and locking condition and the control switch SW closes the branch connected to the third connecting contact 3 on said second diode D2.
  • Said second diode D2 will be advantageously configured to allow the passage of an electrical unlocking pulse, consisting of a negative half wave in this case.
  • a negative half wave pulse thus operates the actuator 4 which opens the locking switch DL allows the manually opening of the door and the consequent opening of the closing switch DS, said actuator 4 controlling said control switch SW, which is returned to closing on said first diode D1, at the same time.
  • an action of the actuator 4 always corresponds to an electrical pulse arriving to the actuator 4 itself which switches the state of the unlocking switch DL from the current state to the opposite state: it closes it if it was open and opens it if it was closed.
  • FIG. 5 a second preferred embodiment of the device according to the present invention will now be illustrated, in which the circuit has, similarly to the case described above with reference to figure 4 , a first 1, a second 2 and a third 3 connecting contacts of the circuit of the household appliance device, a closing switch DS arranged in series with an actuator 4 on the third connecting branch to said third contact 3, a locking switch DL arranged on the branch and electrically in parallel to said third branch.
  • At least one diode D and at least two control switches SW A and SW B are preferably arranged between said third connecting contact 3 and said actuator 4.
  • a first control switch SW A following the circuit starting from said third connecting contact 3, a first control switch SW A , a diode D, and a second control switch SW B are arranged in series between said third connecting contact 3 and said actuator 4.
  • Said third connecting contact 3 is connected to a second pole A 2 of a fourth circuit branch A which ends with a first pole A 1 of said fourth branch A.
  • Said third branch of the circuit on which said actuator 4 and said closing switch DS are present ends with a first pole B 1 of said third branch, while a second pole B 2 of said third branch is arranged between said first pole B 1 and said actuator 4.
  • said first control switch SW A may be switched between said first pole A 1 of said fourth branch A and said first pole B 1 of said third branch, while said second control switch SW B may be switched between said second pole A 2 of said fourth branch A and said second pole B 2 of said third branch.
  • Said diode D is arranged in series between said first control switch SW A and said second control switch SW B .
  • the circuit of the device is in the configuration of figure 5 , in which both switches, i.e. the door closing switch DS and the door locking switch DL, are open.
  • control electronics of the household appliance detects the door opening condition deriving from the opening of the closing switch DS.
  • the closing switch DS When the user manually closes the household appliance door, the closing switch DS is closed and the control electronics thus detects the closing of the circuit between the second 2 and third 3 connecting contacts.
  • Said first control switch SW A is closed on said first pole B 1 of said third branch, and said second control switch SW B is closed on said second pole A 2 of said fourth branch A.
  • the circuit may be supplied with a positive half wave locking pulse; indeed, only such a pulse can activate the actuator 4, because it is the only pulse which can cross the diode D.
  • said diode D could be configured in a manner so as to allow the passage of a negative half valve electrical pulse.
  • the actuator 4 When the actuator 4 is supplied by the current, it operates, as occurs in the embodiment shown in figure 4 , both the locking switch DL and the first SW A and the second SW B control switches.
  • said actuator causes the closing of the locking switch DL and switches the first control switch SW A on said first pole A 1 of said fourth branch A and said second control switch SW B on said second pole B 2 of said third branch.
  • both switches DS and DL are closed, the control electronics of the household appliance detects a door closing and locking condition and the control switches SW A and SW B close the electrical connection between said third connecting contact 3 and said third branch allowing the passage of an unlocking pulse, in particular in the supplied example this is a negative half wave pulse which in the provided example, can reach and operate said actuator 4.
  • a negative half wave pulse thus operates the actuator 4 which opens the locking switch DL allows the manual opening of the door and the consequent opening of the closing switch DS, said actuator 4 controlling said control switch SW which is returned to closing on said first diode D1 at the same time.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Textile Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Push-Button Switches (AREA)

Claims (5)

  1. Circuit de commande pour un dispositif de verrouillage d'un appareil électroménager ayant une première dérivation connectée à un premier contact de connexion (1), une deuxième dérivation connectée à un deuxième contact de connexion (2) et une troisième dérivation connectée à un troisième contact de connexion (3) de l'appareil électroménager, le dispositif comprenant :
    - un commutateur de verrouillage de porte (DL) agencé sur ladite première dérivation connectée audit premier contact (1) ;
    - un commutateur de fermeture de porte (DS) agencé sur ladite troisième dérivation connectée audit troisième contact (3) et audit commutateur de verrouillage (DL) ;
    - un actionneur (4), agencé électriquement en série avec ledit commutateur de fermeture de porte (DS) ;
    caractérisé par
    au moins un commutateur de commande (SW, SWA, SWB) agencé électriquement en série entre ledit troisième contact (3) et ledit actionneur (4) ; une première diode (D1), une seconde diode (D2) et un commutateur de commande (SW), ladite première diode (D1) et ladite seconde diode (D2) étant électriquement en parallèle l'une avec l'autre et agencées entre ledit troisième contact (3) et ledit commutateur de commande (SW), ledit commutateur de commande (SW) pouvant être commuté sélectivement entre ladite première diode (D1) et ladite seconde diode (D2), réalisant ainsi un contact électrique en série entre ledit troisième contact (3) et ledit actionneur (4), les diodes ayant une polarisation opposée.
  2. Circuit selon la revendication 1, caractérisé en ce qu'il comprend un premier commutateur de commande (SWA), une diode (D) et un second commutateur de commande (SWB) agencés électriquement en série entre ledit troisième contact de connexion (3) et ledit actionneur (4).
  3. Circuit selon la revendication 1, caractérisé en ce qu'il comprend une quatrième dérivation de circuit (A) qui comprend un premier pôle (A1) et un second pôle (A2), ledit second pôle (A2) étant connecté audit troisième contact de connexion (3), et en ce que ladite troisième dérivation de circuit comprend un premier pôle (B1) de ladite troisième dérivation et un second pôle (B2) de ladite troisième dérivation, agencé entre ledit premier pôle (B1) et ledit actionneur (4).
  4. Circuit selon la revendication 1, caractérisé en ce que ledit actionneur (4) est formé d'un solénoïde.
  5. Dispositif de verrouillage d'une porte d'appareil électroménager, caractérisé en ce qu'il comprend un circuit de commande selon l'une quelconque des revendications 1 à 4.
EP15720272.2A 2014-04-07 2015-03-31 Circuit de commande permettant d'actionner un dispositif de verrouillage pour des appareils électroménagers et dispositif comprenant ledit circuit Active EP3129998B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15720272T PL3129998T3 (pl) 2014-04-07 2015-03-31 Obwód sterowniczy do włączania zabezpieczenia przed otwarciem do artykułów gospodarstwa domowego i urządzenie zawierające ten obwód

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20140631 2014-04-07
PCT/EP2015/056972 WO2015155055A1 (fr) 2014-04-07 2015-03-31 Circuit de commande permettant d'actionner un dispositif de verrouillage pour des appareils électroménagers et dispositif comprenant ledit circuit

Publications (2)

Publication Number Publication Date
EP3129998A1 EP3129998A1 (fr) 2017-02-15
EP3129998B1 true EP3129998B1 (fr) 2019-03-20

Family

ID=50981710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15720272.2A Active EP3129998B1 (fr) 2014-04-07 2015-03-31 Circuit de commande permettant d'actionner un dispositif de verrouillage pour des appareils électroménagers et dispositif comprenant ledit circuit

Country Status (4)

Country Link
US (1) US10472858B2 (fr)
EP (1) EP3129998B1 (fr)
PL (1) PL3129998T3 (fr)
WO (1) WO2015155055A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105655169B (zh) * 2015-12-31 2017-11-21 天津凯发电气股份有限公司 一种电气化铁路盘柜五防快速操作电气锁具
IT201700039100A1 (it) 2017-04-10 2018-10-10 Bitron Spa Dispositivo blocca-porta, particolarmente per apparecchi elettrodomestici.
ES2795779T3 (es) 2017-12-06 2020-11-24 Defond Electech Co Ltd Un módulo de circuito de detección para su uso en detectar un estado de funcionamiento de una puerta de aparato electrodoméstico
IT201800006542A1 (it) * 2018-06-22 2018-09-22 Dispositivo blocco-porta.

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
FR1483755A (fr) * 1966-01-17 1967-06-09 Dev D App Electro Mecaniques S Perfectionnement aux dispositifs de sécurité pour machines comportant une partie tournante
GB0223765D0 (en) * 2002-10-14 2002-11-20 Fortress Interlocks Ltd Door locking control apparatus
PL1740752T3 (pl) * 2004-04-27 2013-08-30 Marquardt Gmbh Zamek dla urządzenia gospodarstwa domowego
DE102004060607B3 (de) * 2004-12-16 2006-03-23 Emz-Hanauer Gmbh & Co. Kgaa Türverriegelung für eine Tür eines Haushaltsgeräts
SI22866A (sl) * 2008-09-03 2010-03-31 ITW@METALFLEX@@d@o@o@@Tolmin Varnostna zapora vrat gospodinjskega aparata prednostno pralnega stroja
WO2011031845A1 (fr) * 2009-09-10 2011-03-17 Illinois Tool Works Inc. Verrou d'appareil ménagé avec capteur mécanique de porte
US10597904B2 (en) * 2013-01-17 2020-03-24 Illinois Tool Works Inc. Appliance lock with voltage encoded wiring
US20170004933A1 (en) * 2014-02-03 2017-01-05 Electrotecnica Rold S.R.L. Door locking device for household appliances
WO2015114597A1 (fr) * 2014-02-03 2015-08-06 Elettrotecnica Rold S.R.L. Dispositif de verrouillage de porte pour appareils électroménagers
ES2795779T3 (es) * 2017-12-06 2020-11-24 Defond Electech Co Ltd Un módulo de circuito de detección para su uso en detectar un estado de funcionamiento de una puerta de aparato electrodoméstico

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
WO2015155055A1 (fr) 2015-10-15
US20170058566A1 (en) 2017-03-02
PL3129998T3 (pl) 2019-09-30
EP3129998A1 (fr) 2017-02-15
US10472858B2 (en) 2019-11-12

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